基于气固耦合的煤岩渗透实验分析

bstract:The state change of gas flow in coal is the important reason for the deviation of experimental results on the basis of analyzing the gas flow process in sample in the coal permeability experiments.Gas flow in coal is a complex gas-solid coupling process.The gas-solid coupling is more obvious under high pressure.Pressure can significantly influent the various parameters of gas and this results in errors in the regular infiltration experiments such as the misuse of the gas parameters.It is theoretical analyzed and the corresponding recommendations for improvements are proposed.Gas flow in coal is a significant thermal - fluid - solid interaction process.This process will inevitably be accompanied by the strain of coal and this causes the change of coal porosity.At the same time the coal permeability changes which in turn will affect the flow of coal and the changes of coal skeleton.By the research on the heat-flow-solid coupling process can help understand certain variation regulation of the change of coal permeability and it has great theoretical guidance and important significance for the experiments on the regulation of coal perability.